View Single Post
Old 5th Oct 2019, 11:27 am   #79
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Default Re: Kolster-Brandes MR10

Quote:
Originally Posted by DonaldStott View Post
What voltage should I expect on V1 Pin 3 (cathode) - there is nothing shown in the KB Museum Schematic whereas on Trader Service Sheet 1233 it states that this should be 1.3V?
The cathode voltage for V1 is given in the manufactures manual, it's given as 1 volt in the valve voltages table....The voltages quoted were measured using a 20kohm per volt meter.

The voltages given on the Trader sheet were measured using an AVO electronic meter (VTVM)

The difference in the loading effect on V1's cathode voltage for all intents and purposes will be zilch, ditto for the heater voltage.

Lawrence.
ms660 is offline